Test board for telephone systems



Nov. 11 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 17, 1947 TEST BOARD 200 P03. GRP. K23IF 21 Sheets-Sheet 2 T K232R FIRST TEST K23IR IN V EN T0 FRANK KESSLER Attys.

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F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Nov. 11, 1952 21 Sheets-Sheet 4.

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I w TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. l7, 1947 21 Sheets-Sheet 6 TEST DEVICE FRANK KESSLER FIG. 7

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Lu l I Nov. 11, 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 17, 1947 21 Sheets-Sheet 12 IN V EN TOR. FRANK KESSLER F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 17,1947

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Nov. 11, 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 17, 1947 21 Sheets-Sheet l4 Nov. 11, 1952 F. KESSLER 2,617,896

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11, 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 17, 1947 21 Sheets-Sheet l6 Atfys..

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1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 1'7, 1947 21 Sheets-Sheet 20 mmONE mmONw mwow nNON

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